中文摘要：

采用涂覆法在镁锂合金表面制备了含双-[3-（三乙氧基硅）丙基]四硫化物（KH-69硅烷）改性纳米ZrO2的环氧树脂涂层.通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和电化学阻抗谱（EIS）等手段表征了该涂层.考察了KH-69硅烷改性纳米ZrO2浓度对环氧树脂涂层耐蚀性能的影响.结果表明,KH-69硅烷改性纳米ZrO2能显著提高镁锂合金表面环氧树脂涂层的耐腐蚀性能,其中1.0%（质量分数）KH-69硅烷改性纳米ZrO2环氧树脂涂层具有较好的耐蚀性能.在NaCl溶液中浸渍528 h后的低频阻抗值为1.6×109Ω·cm2,相比在NaCl溶液中浸渍240 h的纯环氧树脂涂层提高约5个数量级.

英文摘要：

The epoxy coatings containing ZrO2 nanoparticles modified with bis-[ 3-（triethoxysilyl） propyl ] tetrasulfide（KH-69 silane） were prepared by coating method on the surface of Mg-Li alloy. The effect of concentration of KH-69 silane-modified ZrO2 nanoparticles on the corrosion resistance of epoxy coatings was evaluated. The addition of KH-69 silane-modified ZrO2 nanoparticles can considerably improve the corrosion resistance of the epoxy coating on the surface of Mg-Li alloys. Among them, the epoxy coating containing 1.0% KH-69 silane-modified ZrO2 nanopartieles exhibits the highest corrosion resistance. After 528 h of immersion in 3.5% NaCl solution, its low frequency impendence valve is about1.6×109Ω·cm2, which exhibits an increase of about five order of magnitude as compared with the blank epoxy coating.